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9/16/15

ECET 303-101

Lab 1: MEASUREMENT OF OHM’S LAW, KCL AND KVL

Prelab

Figure 1

Figure 1

Figure 2

Figure 2

Error Analysis

Using 100 as the value of R2, range for voltage is 90 omhs-110 ohms and range of current is from 450µA-500µA.

1. For the circuit in Figure 1, vary R2 with the resistors as specified in the table below, and fill in the table in the measured values section. Before measuring the voltage and current, measure the exact value of the resistor you are using. PR2

PR2

| Expected Values | Measured Values | Simulated Values | | R2 | vr2 | ir2680 µA

680 µA | vr2 | ir2 | vr2 | ir2 | .211µW

.211µW

| 47Ω | 31 mv

31 mv | ghgh | | | 31.971mV | 678.113µA | .25µW

.25µW

| 100 Ω | 50 mv

50 mv ghghghgh | 500 µA

500 µA | | | 50mV | 500 µA | .144µW

.144µW

| 470 Ω | 82mv

82mv

| 175 µA

175 µA | | | 82.456mV | 174.310 µA | 8.1µW

8.1µW

| 1000 Ω | | 90 µA

90 µA | | | 91.101mv | 91.081µA | 1.94µW

1.94µW

| 4700 Ω | 90 mv

90 mv

97 mv

97 mv | 20 µA

20 µA | | | 97.451mV | 18.381µA |

Table 1

2. Plot ir2 vs. vr2

3. Repeat steps 1 and 2 for the circuit to the right in figure 2.

PR2

PR2

| Expected Values | Measured Values | Simulated Values | | R2 | 2.7mA

2.7mA

100mv

100mv

vr2 | ir2 | vr2 | ir2 | vr2 | ir2 | .27mW

.27mW

.1mW

.1mW

| 47Ω | hgh | fgf | | | 100mv | .28mW | 21.3µW

21.3µW

| 100 Ω | 100mv

100mv

| 1 mA

1 mA | | | 100mv | .1mW | 10µW

10µW

| 470 Ω | 100mv

100mv

| 212.7 µA

212.7 µA | | | 100mv | 21,3µW | | 1000 Ω | | 100 µA

100 µA | | | 100mv | 9.89µW | 2.1µW

2.1µW

| 4700 Ω | 100mv

100mv

100mv

100mv

| 21.2 µA

21.2 µA | | | 100mv | 2.06µW |

Table 2

4. Compare the values you obtained in this experiment vs. calculated values. Demonstrate that you can explain the differences…...

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